/*******************************************************************************
* Copyright (c) 2000, 2015 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Andrey Loskutov <loskutov@gmx.de> - Bug 420956
* Lars Vogel <Lars.Vogel@vogella.com> - Bug 472654
*******************************************************************************/
package org.eclipse.ui.internal.dialogs.cpd;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.IColorProvider;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.internal.dialogs.cpd.CustomizePerspectiveDialog.ActionSet;
import org.eclipse.ui.internal.dialogs.cpd.CustomizePerspectiveDialog.DisplayItem;
/**
* A label provider which takes the default label provider in the
* TreeManager, and adds on functionality to gray out text and icons of
* contribution items whose action sets are unavailable.
*
* @since 3.5
*
*/
class GrayOutUnavailableLabelProvider extends TreeManager.TreeItemLabelProvider implements IColorProvider {
private Display display;
private ViewerFilter filter;
private Set<Image> toDispose;
public GrayOutUnavailableLabelProvider(ViewerFilter filter) {
this.display = PlatformUI.getWorkbench().getDisplay();
this.filter = filter;
toDispose = new HashSet<>();
}
@Override
public Color getBackground(Object element) {
return null;
}
@Override
public Color getForeground(Object element) {
if (element instanceof DisplayItem) {
if (!CustomizePerspectiveDialog.isEffectivelyAvailable((DisplayItem) element, filter)) {
return display.getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW);
}
}
if (element instanceof ActionSet) {
if (!((ActionSet) element).isActive()) {
return display.getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW);
}
}
return null;
}
@Override
public Image getImage(Object element) {
Image actual = super.getImage(element);
if (element instanceof DisplayItem && actual != null) {
DisplayItem item = (DisplayItem) element;
if (!CustomizePerspectiveDialog.isEffectivelyAvailable(item, filter)) {
ImageDescriptor original = ImageDescriptor.createFromImage(actual);
ImageDescriptor disable = ImageDescriptor.createWithFlags(original, SWT.IMAGE_DISABLE);
Image newImage = disable.createImage();
toDispose.add(newImage);
return newImage;
}
}
return actual;
}
@Override
public void dispose() {
for (Image image : toDispose) {
image.dispose();
}
toDispose.clear();
super.dispose();
}
}